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Definition of Radioisotope

Babylon English

radioactive isotope (Chemistry)
Radioisotope Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

radioisotope
n : a radioactive isotope of an element; produced either naturally or artificially

WordNet 2.0

Noun
1. a radioactive isotope of an element; produced either naturally or artificially
(hypernym) isotope
(hyponym) tracer
Radioisotope Definition from Science & Technology Dictionaries & Glossaries
NRC Nuclear Energy Glossary
An unstable isotope of an element that decays or disintegrates spontaneously, emitting radiation. Approximately 5,000 natural and artificial radioisotopes have been identified.
A service to the public by The U.S. Nuclear Regulatory Commission (NRC).
EIA Energy Glossary
A radioactive isotope.
Source: Energy Information Administration, 2006
Radioisotope Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
A radionuclide, or a radioactive nuclide, is an atom with an unstable nucleus, characterized by excess energy available to be imparted either to a newly created radiation particle within the nucleus or via internal conversion. During this process, the radionuclide is said to undergo radioactive decay, resulting in the emission of gamma ray(s) and/or subatomic particles such as alpha or beta particles. These emissions constitute ionizing radiation. Radionuclides occur naturally, or can be produced artificially.

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Radioisotope Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
galu-saya-dahsu
Radioisotope Definition from Medicine Dictionaries & Glossaries
NCI Dictionary of Cancer Terms
An unstable element that releases radiation as it breaks down. Radioisotopes can be used in imaging tests or as a treatment for cancer.
A Service of the National Cancer Institute.
CDC Radiological Terms
isotopes of an element that have an unstable nucleus. Radioactive isotopes are commonly used in science, industry, and medicine. The nucleus eventually reaches a stable number of protons and neutrons through one or more radioactive decays. Approximately 3,700 natural and artificial radioisotopes have been identified.
  
Source: Centers for Disease Control and Prevention (CDC) ( About )
Dictionary of Medicine (Shahram)
A radioactive isotope. (An isotope is an alternate version of a chemical element that has a different atomic mass).